like I wrote before, it is very difficult to judge from a photo specially a dial that is changing color according to light temperature and light angle of exposure. if you refer to the shot I posted some pages ago, yes mine is a Mark3 and, these are non processed.Mark III is very different from Mark I. ZF is supposed to have made the III... In the sun, yours is also very different from the III !
if we talk about the color exclusively, it could be summed up like this :
gen varies from
-soft grey when cloudy
-soft blue when dark outside --> ZF managed to mimic this color imo
-blue when sun shines
-looks "metallic" at noon
-looks green at 4:00pm
each of the colors are nice with a preference for the 1st and last when on. the wrist....
without being an expert my feeling is that the way the dial is machined and painted makes these color change and differences.